scons: whitespace cleanup

This text transformation was done automatically via the following shell
command:

$ find -name SCons\* -exec sed -i s/\\s\\+$// '{}' \;

Signed-off-by: Giuseppe Bilotta <giuseppe.bilotta@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>

src/compiler/SConscript.glsl

@@ -51,7 +51,7 @@ glsl_sources = [
     glcpp_parser[0],
     glsl_lexer,
     glsl_parser[0],
-] 
+]
 
 # parse Makefile.sources
 source_lists = env.ParseSourceList('Makefile.sources')